self-defence vs Australian spelling

self-defence and Australian spelling both are nouns.

Word	Noun	Adjective	Verb	Adverb
self-defence	Yes	No	No	No
Australian spelling	Yes	No	No	No

self-defence (noun)	Australian spelling (noun)
the act of defending yourself	English orthography used in Australia (characterized by 'analyse', 'centre', 'usable')